JP2001250296A - Tape traveling regulation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tape traveling regulation device capable of enhancing stability during tape traveling, and reducing costs. SOLUTION: A projected part 1b is formed in the upper surface of a guide base 1, a wave washer 6 and a lower flange 2 are engaged with the projected part 1b, and a guide 3 is placed on the lower flange 2. Thus, since the upper surface of the projected part 1b of the lower flange 2 and the bottom surface 3a of the guide 3 are brought into contact with each other, dimension tolerance from a guide reference surface to a tape traveling reference surface is set to be only component tolerance ±α of the guide base 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape running control device, and more particularly to a tape running control device for controlling tape running in a magnetic tape device.

[0002]

2. Description of the Related Art FIG. 6 is an assembly procedure diagram of an example of a conventional tape running control device, and FIG. 7 is an assembly diagram thereof. Referring to FIG. 6, a conventional tape running control device includes a guide base 11,
Lower flange 12, guide 13, upper flange 1
4 and a fixing screw 15. In addition, a screw groove is threaded at the tip of the fixing screw 15. The lower flange 12, the guide 13, and the upper flange 14 are formed with openings having a diameter sufficient for inserting the fixing screws 15, and similarly, the guide base 11 is provided with screw grooves for screwing the fixing screws 15. It is engraved.

[0003] Then, as shown in FIG.
These are loaded on the lower flange 12, the guide 13, and the upper flange 14 in this order.
2. The fixing screw 15 is screwed into the screw groove of the guide base 11 through the opening of the guide 13, the upper flange 14. Thereby, the lower flange 1 is placed on the guide base 11.
2. The guide 13 and the upper flange 14 are fixed.

Now, the bottom surface 11a of the guide base 11 is defined as a guide reference plane A. The distance from the guide reference plane to the upper surface 11b of the guide base 11 is B. Then, the thickness of the guide base 11, that is, the distance B includes the dimensional tolerance ± α. Further, assuming that the thickness of the lower flange 12 is C, the thickness C includes a dimensional tolerance ± β.

On the other hand, when the lower flange 12, the guide 13, and the upper flange 14 are fixed on the guide base 11 (see FIG. 7), the position of the bottom surface 13a of the guide 13 is called a tape running reference surface. It is preferable that the difference between the tape running reference surface and the reference surface (tape reference edge) of the magnetic tape during tape running is as small as possible.

As another conventional technique, the upper flange 14 is used as a tape running reference surface. However, this is a structure in which the upper flange 14 and the guide base 11 are not in direct contact.

On the other hand, other examples of this type of tape running control device are disclosed in Japanese Utility Model Laid-Open Publication No. Sho 61-72750 (hereinafter referred to as Document 1), Japanese Patent Application Laid-Open No. 1-302563 (hereinafter referred to as Document 2), and JP-A-3-203854 (hereinafter referred to as Reference 3)
) And Japanese Patent No. 2880685 (hereinafter, referred to as Document 4). The technique described in Document 1 is to increase the inner diameter of a roller post from top to bottom. The technique described in Document 2 is to provide a projection on the tape contact surface of the lower ceramic guide. The technique described in Document 3 is to incline the upper surface of the lower flange at a predetermined angle. The technique described in Document 4 is to press the magnetic tape in the width direction by the upper flange.

[0008]

However, the prior art has the following problems. As a first problem, since the lower flange 12 is mounted on the upper surface 11b of the guide base 11 and the guide 13 is mounted thereon, the two component tolerances (± α) of the guide base 11 and the lower flange 12 are provided.
+ (± β) is added to the tape running reference plane. The same applies when the upper flange is used as the reference plane. As a result, tape running becomes unstable, and there is a possibility that information cannot be read / written correctly.

As a second problem, in addition to the high-precision tolerance of the guide base 11, the lower flange 12 also requires a high-precision tolerance, resulting in an expensive product. Means for solving these problems are not disclosed in any of the above-mentioned documents 1 to 4.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a tape running restricting device capable of improving stability during tape running and reducing costs.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a guide around which a tape-shaped recording medium is wound, and an upper flange provided on an upper surface of the guide for regulating a running position of the tape-shaped recording medium. A lower flange provided on a bottom surface of the guide for restricting a running position of the tape-shaped recording medium; and a guide base on which the lower flange is mounted. A contact means for contacting the bottom surface with the top surface of the guide base is provided.

According to the present invention, since the bottom surface of the guide and the upper surface of the guide base are in contact with each other, the component tolerance ± β of the lower flange 12 can be omitted from the element for determining the tape running reference surface. .

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an assembling procedure diagram of a tape running regulating device according to a preferred embodiment of the present invention, and FIG. 2 is an assembling diagram thereof. FIG. 3 is a schematic explanatory view showing a deformation of a wave washer to be described later, FIG. 4 is a plan view showing the entire configuration of the guide base, and FIG.

First, the overall configuration of the guide base will be described. Referring to FIGS. 4 and 5, a lower flange 2, a guide 3, an upper flange 4, and a pair of fixing screws 5 are provided on the upper surface of a guide base 1, and a magnetic head 7 is provided therebetween. I have. The guide 3 is fixed to the guide base 1 with fixing screws 5 while being sandwiched between the upper flange 4 and the lower flange 2. Although not shown in FIGS. 4 and 5, the lower flange 2 and the guide base are not shown.
A wave washer 6 described later is inserted between the switches 1.

Then, the magnetic tape 8 is wound around both the left and right guides 3 and runs left or right in contact with the magnetic head 7 to read and write information. In order to read and write this information accurately,
It is necessary to minimize the deviation of the reference surface (tape reference edge) of the magnetic tape 8 from the tape running reference surface.

Next, the tape running regulating device will be described. Referring to FIG. 1, a tape running regulating device according to the present invention comprises a guide base 1, a lower flange 2, a guide 3
, Upper flange 4, fixing screw 5, wave washer 6
It is comprised including. A screw groove is formed at the tip of the fixing screw 5. And the upper flange 1
4. An opening having a diameter sufficient for inserting the fixing screw 5 is formed in the guide 3, and a screw groove for screwing the fixing screw 15 is similarly formed in the guide base 1.

On the other hand, the lower flange 2 is formed with an opening having a larger diameter than the openings formed in the upper flange 14 and the guide 3. On the other hand, on the upper surface 1a of the guide base 1, a convex portion 1b having a diameter sufficient to fit into the opening of the lower flange 2 is formed.

Then, as shown in FIG.
The wave washer 6 and the lower flange 2 are fitted to the convex portion 1b of the first member, and the guide 3 and the upper flange 4 are stacked on the lower flange 2; The fixing screw 5 is screwed into the screw groove of the guide base 1. As a result, the lower flange 2, the guide 3, and the upper flange 4 are fixed on the guide base 1.

That is, the bottom surface 3a of the guide 3 is brought into direct contact with the convex portion 1b of the guide base 1, and the vertically movable lower flange 2 is inserted between them.
In order for the magnetic tape 8 to travel, the lower flange 2 is required.
And the guide 3 need to be kept in contact with each other, so that a wave washer 6 having a spring property is inserted between the lower flange 2 and the guide base 1. Then, the upper flange 4 is placed on the upper surface 3b of the guide 3 and tightened with the fixing screw 5, thereby tightening the fixing screw 5 (pressing force from above) and the spring property of the wave washer 6 (pressing force from below; FIG. 3), the contact between the lower flange 2 and the guide 3 can be maintained. At this time, the dimensional tolerance from the guide reference surface to the tape running reference surface is only the component tolerance ± α of the guide base 1.

While the magnetic tape 8 is running, the magnetic tape 8 jumps in a direction perpendicular to the tape running direction. This jump is suppressed by the lower flange 2 and the upper flange 4. Here, since the lower flange 2 is pressed by the spring force of the very strong wave washer 6, it does not move in the vertical direction when the magnetic tape 8 jumps. Further, the tape reference edge of the magnetic tape 8 substantially coincides with the tape running reference plane.

In the above-described embodiment, the wave washer 6 is used to bring the lower flange 2 into contact with the guide 3. The same effect can be obtained by using the parts described above.

[0022]

According to the present invention, a guide around which a tape-shaped recording medium is wound, an upper flange provided on an upper surface of the guide to regulate a running position of the tape-shaped recording medium, and a lower surface provided on a bottom surface of the guide. A tape travel regulating device including a lower flange for regulating a traveling position of the tape-shaped recording medium, and a guide base on which the lower flange is placed, the device comprising a lower surface of the guide and an upper surface of the guide base. Therefore, it is possible to enhance the stability during tape running and reduce the cost.

More specifically, the first effect is that the dimensional tolerance from the guide reference surface to the tape running reference surface is added only to the component tolerance of the guide base, so that the running stability is improved and information is written. / Reading performance can be improved.

The second effect is that the dimensional tolerance of the lower flange can be reduced, so that the cost is reduced.

[Brief description of the drawings]

FIG. 1 is an assembling procedure diagram of a tape running regulating device according to a preferred embodiment of the present invention.

FIG. 2 is an assembly view of the same.

FIG. 3 is a schematic explanatory view showing a deformation of a wave washer.

FIG. 4 is a plan view showing an entire configuration of a guide base portion.

FIG. 5 is a front view of the same.

FIG. 6 is an assembly procedure diagram of an example of a conventional tape running restriction device.

FIG. 7 is an assembly view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Guide base 2 Lower flange 3 Guide 4 Upper flange 5 Fixing screw 6 Wave washer

Claims (8)

[Claims] 1. A guide on which a tape-shaped recording medium is wound, an upper flange provided on an upper surface of the guide for regulating a running position of the tape-shaped recording medium, and a tape-shaped recording medium provided on a bottom surface of the guide. A tape travel regulating device including a lower flange for regulating a traveling position and a guide base on which the lower flange is placed, comprising a contact means for bringing a bottom surface of the guide into contact with an upper surface of the guide base. Characteristic tape running control device. 2. The contact means has a lower flange formed in an annular shape, and a convex portion is formed on a part of the upper surface thereof, and the upper surface of the convex portion comes into contact with the bottom surface of the guide through an opening of the lower flange. 2. A tape running restricting device according to claim 1, wherein said tape running restricting device comprises said guide base. 3. The tape running restricting device according to claim 1, wherein the lower flange includes an elastic member inserted between the lower flange main body and the upper surface of the guide base. 4. The apparatus according to claim 1, wherein the upper flange and the guide are formed in an annular shape, and further include a screw member screwed into the guide base through respective openings of the upper flange, the guide and the lower flange. The tape running restriction device according to any one of claims 1 to 3. 5. The tape running restricting device according to claim 3, wherein the elastic member is a wave washer. 6. The tape running restriction device according to claim 3, wherein said elastic member is a dish washer. 7. The tape running restriction device according to claim 3, wherein the elastic member is a coil spring. 8. The tape running restriction device according to claim 3, wherein said elastic member is rubber.